Dial indicator



Jan. 30, 1945. l R w E BRUN 2,368,479

DIAL INDICATOR Filed Aug. 9, 1943 Patented Jan. 30, 1945 I UNITED STA ES zt ssa nej r i -1mm, Rosario .W. Le Brun, jwaterloo N. Y; Application August 9, 1943;:Seriala 497,99;

Qlaima; (01.- 2134472.). I

This invention is a novel dial indicator pare ticularly adapted for use in connection with-milina r ndi or other machines, the indicator being ordinarily mounted upona supporting at tachment consisting of a case having an arm adjustably swingab-ly mounted thereon in the manner shown in my U.. S. Letters Pate'nt'No. 2,322; I

033, dated June 15, 1943, although the dial in-- dicator may be mounted'on any other desired support whereby same maybe positioned to engage the work being operated upon by the machine, thereby dispensing with the necessit of having to remov the Work from the-machine or to use extraneous instruments inchecking the dimensions of the work.

' The principal object of the present invention is to provid a dial indicator of the above type having certain novel features of construction. imparting thereto simplicity and accuracy. 7

I will exp-lain the invention with reference to the accompany drawing, which. illustrates one practical embodiment thereof to enable others familiar with the art to adopt and use the same;

and will summarize in the claims, the novel features of construction, and novel. combinations of parts, for which protection is desired.

In said drawing:

Fig. l is a vertical section through the dial in-v the shaft being journaled' in ball bearing 2'.

mountedin' a housing .28 carried by a plate 23 seatedjin a shoulder formed by: an internal annular' recess in the outer end of the casing 22, said housing 28 having-an opening disposed coaxially of shaft 26, which shaft carries a gear 33. The

outer end of the shaft 26 opposite the opening.

in the housing. 28 has a non-circular bore adapted to receive the shank 3| of a pointer 32 wheret 01 by as the shaft 26 is rotated the pointer 32 will be correspondingly rotated. Within the outer end of casing 22 spaced from the plate 29 by a ring .33 is a graduated dial plate, as indicated in Fig.

3, and in the outer end of .the casing 22 is a transparent cover 35 spaced from the dial plate 34 by a ring 38. A ferrule 31 having an internal annular. flange at its outer end is secured exteriorl'y of casing 22 by threads or the like, said ferrule holding the members 29, 34 and 35 in place by means of the spacing collars 33 and 36, the pointer 32 moving in the space between the dial plate 34 and the transparent closure 35.

The shaft 26 is normally urged to rotate in one direction by means of a coiled spring 38 (Fig. 2) having one end fixed to the shaft 26 and its opposite end secured in a post 39 which is mounted on the wall of casing 22 by means of screws 40.

Within casing 22 parallel with'but offset from the-shaft26 is a rock shaft 4| having its ends journaled in the base 22a of the. casing and in the plate 29,.said shaft having an arm 42 thereon carrying a gear segment 43 in constant mesh with gear on shaft 25. Stop pins 44 and 45 and an open front, said casing havin a split chuck 22b extending rearwardly of the base,.the

chuck having a conical outer wall and beingadapted to receive the end of a rod support 23 (Fig. 1) which has one end engaged in the split chuck 22b. The base of the split chuck adjacent the base 22a of casing 22 is threaded exteriorly as at 22c and a nut 24 is mounted upon the threaded portion of the split chuck, the same having a conical extension 24a engaging the split chuck 22b whereby as the nut is'tightened the split chuck 22b will be contractedaround thev sun porting rod 23 and hold the same in adjusted 1 position.

Within the casing 22 at the base thereof is a recess receiving a ball bearing25 in which one end of a shaft 25 is journaled. the opposite end of engage "the ends of segment 43 to control the swinging movement of the arm 42, and when the segment engages stop 44 as shown in Fig, 2 the pointer 32 will lie opposite the zero graduation of the dial 34 owingto the action of the spring 38,-the other stop 45 (Fig. 2) limiting the movement of the ointer in a clockwise direction, but permitting the pointer 32 to make one complete revolution.

Within casing 22 at the side opposite from rock sha'ft 4| is a shaft 46 upon which is mounted a ball lever 4! having a,.s10t 41a receiving the pointer. shaft 26, the inner end of lever 41 extending beside the arm 42 of the segmental gear43 and carrying on its inner end a laterally projecting pin 48 engaging an elongatedslot 42a in the arm 42 whereby as the lever 41 is pivoted the arm 42 will be correspondingly rocked and the pointer 32 correspondingly rotated."- When however thepressure on the lever 41 is removed the spring 38 will restore the pointer, '32 to position overlying the zero mark of the NT} I OFFICE J dial 34, which .dial may be graduated in any desired manner, for any desired purpose.

I do not limit my invention to the exact forms shown in the drawing, for obviously changes may be made therein within the scope of the claims.

I claim:

7 1. A dial indicator, comprising a casing; a

pointer shaft journaled therein carrying a gear; a rock shaft journaled therein beside the pointer shaft; an arm on said rock shaft having an axial slot and carrying a gear segment meshing with said gear; means urging the pointer shaft to rotate in one direction; and a ball lever extending into and pivoted within said casing and having a member slidably engaging the slot in the arm comprising a casing, a pointer shaft journaled therein carrying a gear, a rock shaft journaled therein beside the pointer shaft; an arm on said rock shaft carrying a gear segment meshing with the gear; means for limiting the stroke of the gear segment whereby the gear may make one complete revolution; means urging the pointer shaft to rotate in one direction; and a ball lever extending into and pivoted within said casing and engaging the arm of the rock shaft, whereby when the ball lever is swung the pointer shaft will be rotated in the opposite direction within the limits of one complete revolution; said ball lever having an arcuate slot therein receiving the pointer shaft in any position of the lever to per! mit swinging of the lever; the inner end of the lever extending beside the arm on the rock shaft; and a lateral projection on the inner end of the lever engaging an elongated slot in said arm, whereby as the lever is pivoted the arm will be correspondingly rocked and the pointer shaft correspondingly rotated.

ROSARIO W. LE BRUN. 

